Transistor Tutorial history sample circuits
Posted on Feb 5, 2014
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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Here is a circuit for using the printer port of a PC, for control application using software and...
At startup, the voltage in the trigger input at pin 2 is less than the trigger level voltage, "13...
This circuit uses a programmable op amp such as the -HA2730-a two-amplifier monolithic chip with...
This 5-V circuit utilizes a servo-controlled dc/dc converter to generate the compliance voltage...
I`ve designed IFA antenna in Altium as described in DN007 and created a balun circuit from the...
This is a universal 1 Watt RF class C amplifier that is ideally suited for low power FM...
This is a high fidelity external USB Soundcard / USB Headphones project that can be built for...
Install your fresh mod board into your FDS drive mechanism. You need to cut two traces and solder...
This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply....
Here is a simple and powerful LED based night lamp circuit that can be operated directly from the...
Determining which drive wire is which on a unipolar stepper motor. This is the type of motor that...
The UART (universal asynchronous receiver/transmitter) is a serial protocol with separate...
Five-stage amplifier Q1-5 amplifies both control signals, 38. 285 kc and 41. 805 kc, while Q6 and...
Converters and data sampling: Figure 27-47 12-bit A/D converter AD574 and 8031 to the interface...
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